feat(cnn_v3): GBufDeferredEffect — simple deferred render (albedo * shadow)

New effect unpacks feat_tex0/feat_tex1 and outputs albedo * shadow.
Replaces CNNv3Effect in cnn_v3_test sequence until training is complete.
37/37 tests passing.

handoff(Gemini): GBufDeferredEffect wired in timeline; CNN v3 pipeline: GBufferEffect → GBufDeferredEffect → sink.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/tests/gpu/test_demo_effects.cc b/src/tests/gpu/test_demo_effects.cc
index d6e9c8a..1bb89f9 100644
--- a/src/tests/gpu/test_demo_effects.cc
+++ b/src/tests/gpu/test_demo_effects.cc
@@ -94,6 +94,11 @@ static void test_effects() {
            fixture.ctx(),
            std::vector<std::string>{"gbuf_feat0", "gbuf_feat1"},
            std::vector<std::string>{"gbuf_view_out"}, 0.0f, 1000.0f)},
+      {"GBufDeferredEffect",
+       std::make_shared<GBufDeferredEffect>(
+           fixture.ctx(),
+           std::vector<std::string>{"gbuf_feat0", "gbuf_feat1"},
+           std::vector<std::string>{"gbuf_deferred_out"}, 0.0f, 1000.0f)},
   };
 
   int passed = 0;